Gravimeter or inertial sensor system using a resonant sensor and method of operating a gravimeter or inertial sensor system
US11181372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2017 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Jun 15, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V7/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gravimeter or inertial sensor system and method of operating such a system is provided. The system comprises a variable frequency signal source (100, 101, 102) configured to provide first and second signals, a resonant sensor (103) connected to receive the first signal, a phase comparator (111) connected to the output of the resonant sensor and to receive the second signal, and a controller (114) connected to the phase comparator. In a first mode, the controller controls the desired frequency of the signals from the variable frequency signal source based on a value of the phase comparator output signal to lock the frequency of the input signals to a resonant frequency of the resonant sensor. In a second mode, the controller disconnects from the variable frequency signal source and records an open loop output signal indicative of the physical parameter to be measured based on the response of the resonant sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.